I believe the answer is D. WWI was the first "total war," in which all of the people in all of the involved countries participated and were impacted.
Are there options? If not, I believe you meant to write glib? If I am not mistaken a good definition would be fluent, smooth, easy and unconstrained. Hope this helps!
The factors which lead to the rise of feudalism was the fact that people couldn't protect themselves and needed land where they could be safe considering the fact that a single peasant didn't have enough capabilities to defend himself. This lead to the fact that these peasants had to give food and goods to their lord with his army.
The retail industry helps producers sell their goods to a national market.
Im pretty sure its A. get fingerprinted